I feel funny to discuss such a minor thing, but…
Typically mouse-dragging up/down the sample transpose (under Instrument/Sample Properties) with the right-button results in +/-12 semitone, but if the value is +/-13 or +/-14 it would be forced to 0 while it should have be +/-1 or +/-2.
Dunno if it’s intended but I would like the behaviour to be consistent thoroughly.